1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> 2 3<!--Converted with LaTeX2HTML 2018.3 (Released July 19, 2018) --> 4<HTML lang="EN"> 5<HEAD> 6<TITLE>gnomview</TITLE> 7<META NAME="description" CONTENT="gnomview"> 8<META NAME="keywords" CONTENT="idl"> 9<META NAME="resource-type" CONTENT="document"> 10<META NAME="distribution" CONTENT="global"> 11 12<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8"> 13<META NAME="viewport" CONTENT="width=device-width, initial-scale=1.0"> 14<META NAME="Generator" CONTENT="LaTeX2HTML v2018.3"> 15 <link rel='apple-touch-icon' sizes='180x180' href='images/favicons/apple-touch-icon.png?v=2017'> 16 <link rel='icon' type='image/png' sizes='32x32' href='images/favicons/favicon-32x32.png?v=2017'> 17 <link rel='icon' type='image/png' sizes='16x16' href='images/favicons/favicon-16x16.png?v=2017'> 18 <link rel='manifest' href='images/favicons/manifest.json?v=2017'> 19 <link rel='mask-icon' href='images/favicons/safari-pinned-tab.svg?v=2017' 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ID="tex2html331" 46 HREF="idl_TABLE_CONTENTS.htm"> 47<IMG WIDTH="65" HEIGHT="24" ALT="contents" SRC="contents.png"></A> 48<BR> 49<B> Previous:</B> <A 50 HREF="idl_gnomcursor.htm">gnomcursor</A> 51 52<B>Up:</B> <A 53 HREF="idl_HEALPix_IDL_subroutines.htm">HEALPix/IDL subroutines</A> 54 55<B> Next:</B> <A 56 HREF="idl_healpix_doc_PDF_HTML_docume.htm">healpix_doc: PDF and HTML documentation</A> 57<B> Top:</B> <a href="main.htm">Main Page</a></DIV> 58<!--End of Navigation Panel--> 59 60<H1><A ID="SECTION2900"></A> 61<A ID="idl:gnomview"></A> 62<BR> 63 64</H1> 65 66<P> 67<b><font size=+6><FONT COLOR="#CC0000">gnomview</FONT></font></b><hr> 68<H3>This IDL facility provides a means to visualise a Gnomonic projection 69(radial projection onto a tangent plane) of 70<b>HEALPix</b> and COBE Quad-Cube maps in an IDL environment. 71It also offers the possibility to 72generate GIF, JPEG, PDF, PNG and Postscript color-coded images of the projected map. 73The projected (but not color-coded) data can also be output in FITS files and 74IDL arrays.</H3> 75Location in HEALPix directory tree: <a href="https://sourceforge.net/p/healpix/code/1005/tree/trunk/src/idl/visu/gnomview.pro"><b>src/idl/visu/gnomview.pro</b></a> 76 77<P> 78<hr><h1>FORMAT </h1><h3>IDL> 79GNOMVIEW, 80 81<A HREF="idl_mollview.htm#idl:mollview:file">File</A> 82[, <A HREF="idl_mollview.htm#idl:mollview:select">Select</A>] 83[, <A HREF="idl_mollview.htm#idl:mollview:asinh">ASINH=</A>, 84<A HREF="idl_mollview.htm#idl:mollview:bad_color">BAD_COLOR=</A>, 85<A HREF="idl_mollview.htm#idl:mollview:bg_color">BG_COLOR=</A>, 86<A HREF="idl_mollview.htm#idl:mollview:charsize">CHARSIZE=</A>, 87<A HREF="idl_mollview.htm#idl:mollview:charsize">CHARTHICK=</A>, 88<A HREF="idl_mollview.htm#idl:mollview:colt">COLT=</A>, 89<A HREF="idl_mollview.htm#idl:mollview:coord">COORD=</A>, 90<A HREF="idl_mollview.htm#idl:mollview:crop">/CROP</A>, 91<A HREF="idl_mollview.htm#idl:mollview:customize">CUSTOMIZE=</A>, 92<A HREF="idl_mollview.htm#idl:mollview:default_settings">DEFAULT_SETTINGS=</A>, 93<A HREF="idl_mollview.htm#idl:mollview:execute">EXECUTE=</A>, 94<A HREF="idl_mollview.htm#idl:mollview:factor">FACTOR=</A>, 95<A HREF="idl_mollview.htm#idl:mollview:fg_color">FG_COLOR=</A>, 96<A HREF="idl_mollview.htm#idl:mollview:fits">FITS=</A>, 97<A HREF="idl_mollview.htm#idl:mollview:flip">/FLIP</A>, 98<A HREF="idl_mollview.htm#idl:mollview:gal_cut">GAL_CUT=</A>, 99<A HREF="idl_mollview.htm#idl:mollview:gif">GIF=</A>, 100<A HREF="idl_mollview.htm#idl:mollview:glsize">GLSIZE=</A>, 101<A HREF="idl_mollview.htm#idl:mollview:graticule">GRATICULE=</A>, 102<A HREF="idl_mollview.htm#idl:mollview:half_sky">/HALF_SKY</A>, 103<A HREF="idl_mollview.htm#idl:mollview:hbound">HBOUND=</A>, 104<A HREF="idl_mollview.htm#idl:mollview:help">/HELP</A>, 105<A HREF="idl_mollview.htm#idl:mollview:hist_equal">/HIST_EQUAL</A>, 106<A HREF="idl_mollview.htm#idl:mollview:hxsize">HXSIZE=</A>, 107<A HREF="idl_mollview.htm#idl:mollview:iglsize">IGLSIZE=</A>, 108<A HREF="idl_mollview.htm#idl:mollview:igraticule">IGRATICULE=</A>, 109<A HREF="idl_mollview.htm#idl:mollview:jpeg">JPEG=</A>, 110<A HREF="idl_mollview.htm#idl:mollview:latex">LATEX=</A>, 111<A HREF="idl_mollview.htm#idl:mollview:log">/LOG</A>, 112<A HREF="idl_mollview.htm#idl:mollview:map_out">MAP_OUT=</A>, 113<A HREF="idl_mollview.htm#idl:mollview:max">MAX=</A>, 114<A HREF="idl_mollview.htm#idl:mollview:min">MIN=</A>, 115<A HREF="idl_mollview.htm#idl:mollview:nested">/NESTED</A>, 116<A HREF="idl_mollview.htm#idl:mollview:no_dipole">/NO_DIPOLE</A>, 117<A HREF="idl_mollview.htm#idl:mollview:no_monopole">/NO_MONOPOLE</A>, 118<A HREF="idl_mollview.htm#idl:mollview:nobar">/NOBAR</A>, 119<A HREF="idl_mollview.htm#idl:mollview:nolabels">/NOLABELS</A>, 120<A HREF="idl_mollview.htm#idl:mollview:noposition">/NOPOSITION</A>, 121<A HREF="idl_mollview.htm#idl:mollview:offset">OFFSET=</A>, 122<A HREF="idl_mollview.htm#idl:mollview:outline">OUTLINE=</A>, 123<A HREF="idl_mollview.htm#idl:mollview:pdf">PDF=</A>, 124<A HREF="idl_mollview.htm#idl:mollview:pfonts">PFONTS=</A>, 125<A HREF="idl_mollview.htm#idl:mollview:png">PNG=</A>, 126<A HREF="idl_mollview.htm#idl:mollview:polarization">POLARIZATION=</A>, 127<A HREF="idl_mollview.htm#idl:mollview:preview">/PREVIEW</A>, 128<A HREF="idl_mollview.htm#idl:mollview:ps">PS=</A>, 129<A HREF="idl_mollview.htm#idl:mollview:pxsize">PXSIZE=</A>, 130<A HREF="idl_mollview.htm#idl:mollview:pysize">PYSIZE=</A>, 131<A HREF="idl_mollview.htm#idl:mollview:reso_arcmin">RESO_ARCMIN=</A>, 132<A HREF="idl_mollview.htm#idl:mollview:retain">RETAIN=</A>, 133<A HREF="idl_mollview.htm#idl:mollview:rot">ROT=</A>, 134<A HREF="idl_mollview.htm#idl:mollview:save">/SAVE</A>, 135<A HREF="idl_mollview.htm#idl:mollview:shaded">/SHADED</A>, 136<A HREF="idl_mollview.htm#idl:mollview:silent">/SILENT</A>, 137<A HREF="idl_mollview.htm#idl:mollview:silhouette">SILHOUETTE=</A>, 138<A HREF="idl_mollview.htm#idl:mollview:stagger">STAGGER=</A>, 139<A HREF="idl_mollview.htm#idl:mollview:subtitle">SUBTITLE=</A>, 140<A HREF="idl_mollview.htm#idl:mollview:titleplot">TITLEPLOT=</A>, 141<A HREF="idl_mollview.htm#idl:mollview:transparent">TRANSPARENT=</A>, 142<A HREF="idl_mollview.htm#idl:mollview:truecolors">TRUECOLORS=</A>, 143<A HREF="idl_mollview.htm#idl:mollview:units">UNITS=</A>, 144<A HREF="idl_mollview.htm#idl:mollview:window">WINDOW=</A>, 145<A HREF="idl_mollview.htm#idl:mollview:xpos">XPOS=</A>, 146<A HREF="idl_mollview.htm#idl:mollview:ypos">YPOS=</A>] 147 148</h3> 149 150<P> 151<hr> 152<H1>QUALIFIERS</H1> 153 154 <DL COMPACT><DT> 155<DD>For a full list of qualifiers see <A HREF="idl_mollview.htm#idl:mollview">mollview</A> 156 </DL> 157 158<P> 159<hr><H1>KEYWORDS</H1> 160 161 <DL COMPACT><DT> 162<DD>For a full list of keywords see <A HREF="idl_mollview.htm#idl:mollview">mollview</A> 163 </DL> 164 165<P> 166 167<hr> 168<H1>DESCRIPTION</H1> 169<blockquote> 170<br><br><FONT COLOR="#CC0000">gnomview</FONT> reads in a <b>HEALPix</b> sky map in FITS format and generates 171a gnomic (or gnomonic) projection of it, that can be visualized on the screen or 172exported in a GIF, JPEG, PNG, PDF or Postscript file. <FONT COLOR="#CC0000">gnomview</FONT> allows the selection of 173the coordinate system, map size, color table, color bar inclusion, 174linear, log, hybrid or histogram equalised color scaling, 175maximum and 176minimum range for the plot, plot-title <I>etc</I>. It also allows the representation of the 177polarization field. 178</blockquote> 179 180<P> 181<hr><H1>RELATED ROUTINES</H1><h3>This section lists the routines related to <b><FONT COLOR="#CC0000">gnomview</FONT></b></h3> 182 183 <DL COMPACT><DT> 184<DD>see <A HREF="idl_mollview.htm#idl:mollview">mollview</A> 185 </DL> 186 187<P> 188<hr><H1>EXAMPLE # 1:</H1> 189<tt><TABLE CELLPADDING=3> 190<TR><TD ALIGN="LEFT">gnomview, 'planck100GHZ-LFI.fits', rot=[160,-30], reso_arcmin=2., $</TD> 191</TR> 192<TR><TD ALIGN="LEFT">pxsize = 500., $</TD> 193</TR> 194<TR><TD ALIGN="LEFT">title='Simulated Planck LFI Sky Map at 100GHz', $</TD> 195</TR> 196<TR><TD ALIGN="LEFT">min=-100,max=100</TD> 197</TR> 198</TABLE></tt> 199<blockquote>gnomview reads in the map 'planck100GHZ-LFI.fits' and generates 200an output image of the size of 500<SPAN CLASS="MATH"> x </SPAN>500 screen pixels, 201with a resolution of 2 arcmin/screen pixel at the center. 202The temperature scale has been set to lie between <SPAN CLASS="MATH"><IMG STYLE="height: 1.46ex; vertical-align: -0.29ex; " SRC="idl_img65.png" 203 ALT="$\pm$"></SPAN> 100, and the units will 204show as <SPAN CLASS="MATH"><IMG STYLE="height: 1.57ex; vertical-align: -0.55ex; " SRC="idl_img66.png" 205 ALT="$\mu$"></SPAN>K. 206The title 'Simulated Planck 207LFI Sky Map at 100GHz' has been appended to the image. 208The map is centered at (<SPAN CLASS="MATH"><I>l</I>=</SPAN>160, <SPAN CLASS="MATH"><I>b</I>=</SPAN>-30) </blockquote> 209 210<P> 211<hr><H1>EXAMPLE # 2:</H1> 212<tt><TABLE CELLPADDING=3> 213<TR><TD ALIGN="LEFT"> 214<P> 215map = findgen(48)</TD> 216</TR> 217<TR><TD ALIGN="LEFT">triangle= create_struct('coord','G','ra',[0,80,0],'dec',[40,45,65])</TD> 218</TR> 219<TR><TD ALIGN="LEFT">gnomview,map,/online,res=25,graticule=[45,30],rot=[10,20,30],$</TD> 220</TR> 221<TR><TD ALIGN="LEFT">title='Gnomic projection',subtitle='gnomview', $</TD> 222</TR> 223<TR><TD ALIGN="LEFT">outline=triangle</TD> 224</TR> 225</TABLE></tt> 226<blockquote>makes a gnomic projection of map (see Figure <A HREF="idl_mollview.htm#fig:plot_visu">1</A>b on 227page <A HREF="idl_mollview.htm#page:plot_visu"><IMG ALT="[*]" SRC="crossref.png"></A>) after an arbitrary rotation, with a graticule grid 228(with a 45<SPAN CLASS="MATH"><SUP><i>o</i></SUP></SPAN> step in longitude and 30<SPAN CLASS="MATH"><SUP><i>o</i></SUP></SPAN> in latitude) and an arbitrary triangular outline</blockquote> 229 230<P> 231 232<P> 233 234<DIV CLASS="navigation"><HR> 235<!--Navigation Panel--> 236<A 237 HREF="idl_gnomcursor.htm"> 238<IMG WIDTH="63" HEIGHT="24" ALT="previous" SRC="prev.png"></A> 239<A 240 HREF="idl_HEALPix_IDL_subroutines.htm"> 241<IMG WIDTH="26" HEIGHT="24" ALT="up" SRC="up.png"></A> 242<A 243 HREF="idl_healpix_doc_PDF_HTML_docume.htm"> 244<IMG WIDTH="37" HEIGHT="24" ALT="next" SRC="next.png"></A> 245<A ID="tex2html331" 246 HREF="idl_TABLE_CONTENTS.htm"> 247<IMG WIDTH="65" HEIGHT="24" ALT="contents" SRC="contents.png"></A> 248<BR> 249<B> Previous:</B> <A 250 HREF="idl_gnomcursor.htm">gnomcursor</A> 251 252<B>Up:</B> <A 253 HREF="idl_HEALPix_IDL_subroutines.htm">HEALPix/IDL subroutines</A> 254 255<B> Next:</B> <A 256 HREF="idl_healpix_doc_PDF_HTML_docume.htm">healpix_doc: PDF and HTML documentation</A> 257<B> Top:</B> <a href="main.htm">Main Page</a></DIV> 258<!--End of Navigation Panel--> 259<ADDRESS> 260Version 3.50, 2018-12-10 261</ADDRESS> 262</BODY> 263</HTML> 264
